The identity of what could be the first "Chibok girl" purportedly freed by Islamic extremists in Nigeria remains in doubt.

A community leader says the vice principal of the school where more than 270 girls were kidnapped in April is trying to get to a northeastern Nigeria hospital to identify her.

About 50 girls escaped at the school or soon after, but 219 remain missing. The mass kidnapping grabbed the world's attention.

Police said a 20-year-old "Chibok girl" was abandoned Wednesday by Boko Haram fighters.

Chibok leader Pogu Bitrus said Friday the girl is physically ill and mentally traumatized: she gave the same first name as the abducted daughter of Chibok's carpenter but a different last name.

He said efforts to email a picture of the girl have failed.